布のドレープについて

―Hamburgerのドレープ係数に関連する布の力学的特性値間の関係―

抄録

  Making the measuring data of some mechanical properties of five kinds of plain weave cotton clothes which have a little difference in their characteristics an object, the relations among mechanical properties related to Hamburger's drape coefficient D.C. were discussed.

  ① In case of same clothes, D.C. of clothes follows with hunging length L of clothes linearly. And next eq. holds

    d(D.C.)/dL＝－k, (k ; const.)

  Here, it was suggested that k will be able to be one of the inherent barometers to show the drape characteristics of clothes.

  ② D.C. of clothes correlates highly with k of clothes. (≈ ; correlative mark)

    D.C.≈－k

  ③ As for total bending rigidity G (α) of clothes expressed as the mean values of bending rigidity in each direction of clothes, and the max. value F_r (max.) of slip resistance force out of ring, the next two eq.s hold well, taking part in k of clothes.

    k＝e 1/G(α)²    k＝e' 1/F_r(max.)^0.588

  where, e and e' are each the antilogarithms of cut length at vertical axes of k on straight lines in log-log curves of k~G (α)² and k~F_r (max.)^0.588

  And more, it is known that D.C. of clothes corresponds bending rigidity of clothes, taking notice of eq. in above ②.

  ④ From two eq.s mentioned in ③, regarding k as the parameter, the next eq. showing relation between G (α) and F_r (max.) is obtained.

    F_r(max.)＝0.198G(α)^3.4